/Engine/Plugins/Runtime/GeometryCache/Source/GeometryCache/Classes/GeometryCacheTrack.h
FindSampleIndexFromTime uses binary search to find the closest index to Time inside Samples
const uint32
const uint32 FindSampleIndexFromTime ( const [TArray](API\Runtime\Core\Containers\TArray)< float > & SampleTimes, const float Time, const bool bLooping )